8218491072 has 56 divisors (see below), whose sum is σ = 23721559872. Its totient is φ = 2490451200.

The previous prime is 8218491049. The next prime is 8218491091. The reversal of 8218491072 is 2701948128.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943554 + ... + 1947777.

Almost surely, 2^8218491072 is an apocalyptic number.

It is an amenable number.

8218491072 is an abundant number, since it is smaller than the sum of its proper divisors (15503068800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8218491072 is a wasteful number, since it uses less digits than its factorization.

8218491072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891357 (or 3891347 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 8218491072 is about 90655.8937521439. The cubic root of 8218491072 is about 2018.0443013308.

The spelling of 8218491072 in words is "eight billion, two hundred eighteen million, four hundred ninety-one thousand, seventy-two".